CN114938405B - Acoustic device and mobile terminal - Google Patents
Acoustic device and mobile terminal Download PDFInfo
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- CN114938405B CN114938405B CN202210311000.8A CN202210311000A CN114938405B CN 114938405 B CN114938405 B CN 114938405B CN 202210311000 A CN202210311000 A CN 202210311000A CN 114938405 B CN114938405 B CN 114938405B
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- 238000004891 communication Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 230000005236 sound signal Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention provides a mobile terminal, which comprises a shell and a first sound emitting device arranged in the shell, wherein a first sound hole and a second sound hole are arranged on the shell; wherein, a folding cover plate and a motor connected with the folding cover plate are arranged between the shell and the first sound generating device; the first sound generating device comprises an active vibration system and a passive vibration system, the active vibration system comprises an active vibrating diaphragm and a voice coil for driving the active vibrating diaphragm to vibrate, the passive vibration system comprises a passive vibrating diaphragm, the active vibrating diaphragm and the passive vibrating diaphragm vibrate in the same direction, a front sound cavity is formed between the active vibrating diaphragm and the shell, a rear sound cavity is formed between the passive vibrating diaphragm and the shell, the first sound hole is communicated with the front sound cavity, and the second sound hole is switchably communicated with the front sound cavity or the rear sound cavity through a folding cover plate. By utilizing the invention, the flexible adjustment of the sound emitting mode of the mobile terminal can be realized by folding the cover plate.
Description
Technical Field
The present invention relates to the technical field of electronic products, and more particularly, to an acoustic device and a mobile terminal.
Background
At present, a mobile terminal with stereo sound effect is generally provided with sound generating devices at the upper end and the lower end of the terminal respectively, and the sound outputting path of the sound generating device at the upper end of the mobile terminal further comprises a sound outputting path of the sound generating device during external playing and a sound outputting path of an earphone mode at the top of a screen of the mobile terminal; because the two voice paths are not mutually independent, when the terminal user uses the earphone mode to make a call, part of sound signals can be transmitted out through the voice path of the voice device, namely the problem of terminal voice leakage exists, and the privacy requirement of the user and the overall sound effect of the voice device are affected.
Therefore, there is a need for a mobile terminal that can flexibly adjust the sound emission mode according to the application requirements of the user.
Disclosure of Invention
In view of the above problems, the present invention is to provide an acoustic device and a mobile terminal, so as to solve the problem that the existing mobile terminal is easy to leak sound and affects the privacy of users.
The invention provides an acoustic device, which comprises a shell and a first sound emitting device arranged in the shell, wherein a first sound hole and a second sound hole are arranged on the shell; wherein, a folding cover plate and a motor connected with the folding cover plate are arranged between the shell and the first sound generating device; the first sound generating device comprises an active vibration system and a passive vibration system, the active vibration system comprises an active vibrating diaphragm and a voice coil for driving the active vibrating diaphragm to vibrate, the passive vibration system comprises a passive vibrating diaphragm, the active vibrating diaphragm and the passive vibrating diaphragm vibrate in the same direction, a front sound cavity is formed between the active vibrating diaphragm and the shell, a rear sound cavity is formed between the passive vibrating diaphragm and the shell, the first sound hole is communicated with the front sound cavity, and the second sound hole is switchably communicated with the front sound cavity or the rear sound cavity through a folding cover plate.
On the other hand, the invention also provides a mobile terminal, which comprises a terminal shell and the acoustic device, wherein the acoustic device is arranged at the top of the mobile terminal, and the terminal shell is provided with a first sound outlet part communicated with the first sound hole and a second sound outlet part communicated with the second sound hole; the mobile terminal is provided with an earphone mode and an outward-playing mode, and when the mobile terminal is in the earphone mode, the folding cover plate swings to one side of the first sound hole; when the mobile terminal is in the outward-playing mode, the folding cover plate swings to the side deviating from the first sound hole.
In the acoustic device in this embodiment, the housing is provided with the first acoustic hole and the second acoustic hole, the first acoustic hole is conducted with the front acoustic cavity, and the second acoustic hole is switchably conducted with the front acoustic cavity or the rear acoustic cavity through the folding cover plate, so that the conversion of the first acoustic device in the receiver mode and the speaker mode can be realized. When the second sound hole is communicated with the rear sound cavity, the first sound emitting device realizes a receiver mode, and the first sound hole and the second sound hole radiate sound waves with opposite phases to form an acoustic dipole. The people around the user play a role in reducing the leakage sound; when the second sound hole is communicated with the front sound cavity, the first sound emitting device realizes a loudspeaker mode, and the second sound hole and the first sound hole jointly radiate sound waves of the front sound cavity.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Furthermore, the invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and attainments together with a more complete understanding of the invention will become apparent and appreciated by referring to the following description taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is an exploded view of an acoustic device according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of an acoustic device according to a first embodiment of the present invention;
FIG. 3 is a partial cross-sectional view of an acoustic device according to a second embodiment of the present invention;
FIG. 4 is a partial cross-sectional view of an acoustic device according to a third embodiment of the present invention;
FIG. 5 is a schematic diagram of a folding cover and a motor according to an embodiment of the invention;
fig. 6 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.
Wherein reference numerals include: the first sound generating device 1, the magnetic circuit 11, the active diaphragm 12, the front cover 121, the passive diaphragm 13, the voice coil 14, the rear cover 131, the first sound hole 21, the second sound hole 22, the screen assembly 3, the folding cover 4, the first baffle 41, the second baffle 42, the hinge 43, the limit slider 44, the limit bar 45, the rotating shaft 46, the rear sound chamber 5, the front sound chamber 6, the arc-shaped pendulum groove 7, the housing 8, the first housing 81, the second housing 82, the second sound generating device 9, the skeleton 10, the voice coil 20, the decelerator 30, and the motor 40.
The same reference numerals will be used throughout the drawings to refer to similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In order to describe the structure of the acoustic device and the mobile terminal of the present invention in detail, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an exploded structure of an acoustic device according to an embodiment of the present invention; fig. 2 shows a partially sectioned schematic structure of an acoustic device according to a first embodiment of the present invention.
As shown in fig. 1 and 2 together, an acoustic apparatus according to a first embodiment of the present invention includes a housing 8 and a first sound emitting device 1 provided in the housing 8, and a second sound hole 22 and a first sound hole 21 are provided in the housing 8; the first sound generating device 1 comprises an active vibration system and a passive vibration system, the active vibration system comprises an active vibrating diaphragm 12 and a voice coil for driving the active vibrating diaphragm 12 to vibrate, the passive vibration system comprises a passive vibrating diaphragm 13, the active vibrating diaphragm 12 and the passive vibrating diaphragm 13 vibrate in the same direction, a front sound cavity is formed between the active vibrating diaphragm 12 and the shell 8, a rear sound cavity is formed between the passive vibrating diaphragm 13 and the shell 8, the first sound hole 12 is communicated with the front sound cavity, and the second sound hole 13 is switchably communicated with the front sound cavity or the rear sound cavity through a folding cover plate 4.
In other words, the cavity on one side of the active diaphragm 12 is in communication with the first acoustic port 21; a folding cover 4 and a motor 40 connected to the folding cover 4 are provided between the housing 8 and the first sound generating device 1; the motor 40 is used for driving the folding cover plate 4 to swing towards the first sound hole 21 (as shown in fig. 2), so that the cavity on one side of the passive diaphragm 13 is communicated with the second sound hole 22, the cavity on one side of the active diaphragm 12 is communicated with the first sound hole 21, the second sound hole 22 is isolated from the first sound hole 21, the first sound hole 21 and the second sound hole 22 radiate sound waves with opposite phases, at this time, in a receiver mode state of the acoustic device, the sound signal of the first sound emitting device 1 is mainly transmitted out through the side sound outlet hole, thereby preventing the second sound hole 22 from leaking sound and improving the privacy of communication; in addition, the motor is further used for driving the folding cover plate 4 to swing towards the side away from the first sound hole 21 (the position opposite to the direction shown in fig. 2), so that the cavity on one side of the passive diaphragm 13 is closed, the second sound hole 22 is communicated with the first sound hole 21, the acoustic device is in a loudspeaker mode, sound transmission can be performed through the second sound hole 22 and the first sound hole 21 at the same time, and then a stereo effect is achieved through cooperation with the second sound emitting device 9 of the acoustic device.
It can be seen that, because the planes of the first sound hole 21 and the second sound hole 22 form a certain included angle, the motor 40 controls the folding cover plate 4 to switch positions in different directions, so that the acoustic device can switch between the receiver mode and the speaker mode, and further the acoustic requirements of the user in different scenes can be satisfied.
It should be noted that, when the acoustic device is in the receiver mode, the folding cover plate 4 is located at a position for isolating the first sound hole 21 and the second sound hole 22, at this time, the second sound hole 22 and the first sound hole 21 form a dipole effect, the rear sound cavity 5 is conducted with the outside through the path a, so as to play a role in reducing far-field leakage sound at the back of the acoustic device and reducing the sound leakage quantity, the first sound hole 21 is close to the human ear, and the front sound cavity 6 is conducted with the outside through the path B, so that the loudness of sound is not affected, further, the clarity of call sound is realized, and the effect of preventing the leakage of call content is achieved.
When the acoustic device is in the loudspeaker mode, the folding cover plate 4 is positioned at a position communicated with the first sound hole 21 and the second sound hole 22, sound emitted by the first sound emitting device 1 is transmitted out through the first sound hole 21 and the second sound hole 22, namely, the path A and the path B are simultaneously communicated with the front sound cavity 6, the rear sound cavity 5 is closed, the effect of outputting a larger sound pressure level can be achieved, and then the folding cover plate is matched with the second sound emitting device 9, so that a high-quality stereo effect is achieved.
In the acoustic device of the present invention, the passive diaphragm 13 may be a flexible film, and may be disposed on an inner side wall of the housing 8 and located in the rear acoustic cavity 5 of the first acoustic device 1, so as to have a function of preventing water from entering the rear acoustic cavity 5; in addition, the vibration of the active vibrating diaphragm 12 drives the passive vibrating diaphragm 13 to vibrate to a certain extent, and then sound waves with opposite phases are output, so that the second sound holes 22 and the first sound holes 21 form a dipole effect, and the working energy of eliminating far-field sound leakage on the back of the spot welder of the acoustic device is achieved.
In a specific embodiment of the present invention, the first sound generating device 1 further includes a housing, a front cover 121 and a rear cover 131 (in the first embodiment, the rear cover structure may not be provided) adapted to the housing, and a magnetic circuit system 11 disposed in an accommodating space formed by the housing 8, the rear cover 131 and the front cover 121, the magnetic circuit system 11 being disposed between the active diaphragm 12 and the passive diaphragm 13, the magnetic circuit system 11 being formed with a magnetic gap for accommodating a voice coil, and a through hole penetrating the magnetic circuit system 11 being provided in the magnetic circuit system 11, a rear sound cavity 5 being formed between the rear cover and the passive diaphragm 13, and a front sound cavity 6 being in communication with the first sound hole being formed between the front cover 121 and the active diaphragm 12; meanwhile, corresponding dustproof screens can be arranged on the front cover 121 and the rear cover 131, the linkage piece is arranged at the junction of the front acoustic cavity 6 and the rear acoustic cavity 5, the active vibrating diaphragm 12 and the passive vibrating diaphragm 13 are arranged on two sides of the magnetic circuit system 11 in parallel, the active vibrating diaphragm 12 is positioned in the front acoustic cavity 6 of the first acoustic device 1, and the passive vibration is positioned in the rear acoustic cavity 5 of the first acoustic device 1.
In the first embodiment, the passive diaphragm 13 is fixed on the inner side of the housing 8 and/or the outer side of the shell, and the passive diaphragm 13 and the first sound generating device 1 belong to two separate structural members, and it is known that other deformation forms exist in the fixing manner of the passive diaphragm 13.
Fig. 3 shows a schematic structure of a partial cross section of an acoustic device according to a second embodiment of the present invention.
As shown in fig. 3, in the second embodiment, a passive diaphragm 13 is located in a magnetic circuit system 11, and an active diaphragm 12 and the passive diaphragm 13 are symmetrically distributed about the magnetic circuit system 11, a skeleton 10 penetrating through the interior of the magnetic circuit system 11 is disposed at the center of the magnetic circuit system 11, the skeleton 10 is located at a central through hole of the magnetic circuit system 11, and the active diaphragm 12 and the passive diaphragm 13 are connected and fixed by the skeleton 10; or the central area of the active diaphragm 12 and/or the passive diaphragm 13 extends into the through hole and is fixedly connected with the opposite side.
In addition, a voice coil 14 suspended in the magnetic circuit 11 is disposed at one side of the active diaphragm 12, the voice coil 14 is suspended in a magnetic gap of the magnetic circuit 11, and generates a sound signal by energizing vibration, and since the active diaphragm 12 and the passive diaphragm 13 are connected by the frame 10, the vibration of the active diaphragm 12 can drive the passive diaphragm 13 to vibrate and output sound waves with opposite phases, so that the second sound hole 22 and the first sound hole 21 form a dipole effect.
Fig. 4 shows a partially sectioned schematic structure of an acoustic device according to a third embodiment of the present invention.
As shown in fig. 4, in the third embodiment of the present invention, the passive diaphragm 13 is also located in the magnetic circuit system, and the active diaphragm 12 and the passive diaphragm 13 are symmetrically distributed with respect to the magnetic circuit system, and a voice coil 20 penetrating the magnetic circuit system is disposed inside the magnetic circuit system, and the active diaphragm 12 and the passive diaphragm 13 are connected and fixed by the voice coil 20.
Wherein, the through hole is arranged at the position of the magnetic circuit 11 corresponding to the magnetic gap, the voice coil 20 penetrates through the magnetic circuit 11 and the active diaphragm 12 and the passive diaphragm 13 are fixedly connected through the voice coil 20, or a framework is arranged to penetrate through the through hole, one end of the framework is connected with the active diaphragm or the bottom of the voice coil, and the other end is connected with the passive diaphragm.
It can be seen that, compared with the second embodiment, the structure of fixing the active diaphragm 12 and the passive diaphragm 13 by using the voice coil 20 can simplify the installation of the skeleton, and the magnetic field acting force of the voice coil 20 in the magnetic circuit system is stronger, and accordingly the acoustic performance is better.
In the above embodiments, the skeleton and the active diaphragm may be integrally formed or the skeleton and the passive diaphragm may be integrally formed. Further, fig. 5 shows a schematic structure of the folding cover and the motor of the embodiment of the present invention.
As shown in fig. 1 to 5 together, the folding cover 4 of the embodiment of the present invention may further include at least two baffles connected by a hinge 43, and two ends of the baffles are provided with extended limit sliders 44; an arc-shaped sliding rail matched with the limiting sliding block 44 is arranged in the shell 8, the limiting sliding block 44 slides in the arc-shaped sliding rail in a limiting mode, further the folding cover plate 4 swings in the left-right direction in the preset arc-shaped sliding rail, and further conduction or isolation of the second sound hole 22 is achieved.
The folding cover plate 4 is provided with a rotating shaft 46, a shell or a shell 8 is provided with a shaft groove corresponding to the position of the rotating shaft 46, the rotating shaft 46 is limited in the shaft groove to move, the free end of the folding cover plate 4 is provided with a long limiting strip 45, or two ends of the free end of the folding cover plate 4 are respectively provided with a limiting block extending out, and the shell 8 is internally provided with a first clamping groove and a second clamping groove which are used for limiting the limiting strip 45 or the limiting block; the folding cover 4 swings in the first and second card slots.
Specifically, an arc-shaped swinging groove 7 can be arranged between the first clamping groove and the second clamping groove, and the size of the arc-shaped swinging groove 7 is larger than that of the ejection sound hole; and the ejection sound hole is positioned at the center of the arc-shaped swing groove 7, and the motor 40 can drive the folding cover plate 4 to swing alternately in the corresponding first clamping groove and second clamping groove, so that the switching between the receiver mode and the loudspeaker mode is realized.
In addition, the motor 40 may be disposed at any one end of the rotary shaft 46 through the decelerator 30, one end of the decelerator 30 is connected with the motor 40, and the other end is combined with the rotary shaft 46 through a hole column, so that the rotary shaft 46 is controlled to rotate through the cooperation of the motor 40 and the decelerator 30. In addition, the motor 40 is fixed on one side of the rotating shaft through the damping support in a limiting manner, and the interference of the motor 40 vibration to the acoustic device can be reduced through the damping support.
As a specific example, the folding cover 4 includes two first baffles 41 and second baffles 42 connected by a hinge 43, a rotation shaft 46 is provided on the second baffles 42, a long limit bar 45 is provided on the free end of the first baffles 41, or at least one limit block is provided at two ends of the free end of the first baffles 41, and the first baffles 41 can swing by adaptively sliding with corresponding tracks through the limit blocks. It can be seen that the number of baffles of the folding cover plate 4 can be set according to the size of the channel to be plugged, and the plugging requirement can be met by generally arranging two baffles.
In addition, the folding cover plate 4 can be made of metal parts such as aluminum alloy parts and stainless steel parts or nonmetal structural parts with certain rigidity. Also, the folding cover 4 may be fixed on an outer sidewall of the housing of the first acoustic device 1 or an inner sidewall of the case 8 of the acoustic device, and when the folding cover 4 is disposed on the housing of the first acoustic device 1, the folding cover 4 and the first acoustic device 1 may be installed inside the acoustic device as an integral structure, thereby simplifying an assembly process.
The acoustic device according to the embodiment of the present invention, the housing 8 may further include a first housing 81 and a second housing 82 which are adaptively connected, and the structure of the housing 8 may be flexibly set for different application scenarios, and the acoustic device may be understood as a speaker module in a conventional sense, which itself forms a front acoustic cavity and a rear acoustic cavity, and is installed as a whole in a mobile terminal; in addition, the shell of the mobile terminal can be matched, namely at least one part of the shell of the acoustic device can be a terminal shell of the mobile terminal, namely the structure of the terminal shell is used as a part of the shell of the acoustic device, and the terminal shell and the shell of the mobile terminal are assembled to form a front acoustic cavity and/or a rear acoustic cavity, so that the space occupied by the whole acoustic device is saved.
Specifically, the housing 8 may include a front surface, a back surface, and a side surface connecting the front surface and the back surface, the screen assembly may be disposed on the front surface, the first sound hole is disposed on the front surface of the housing 8 or on a junction between the front surface and the side surface, and the second sound hole is disposed on the back surface, the side surface, or a junction between the back surface and the side surface.
The present invention also provides a mobile terminal corresponding to the above-mentioned acoustic device, and in particular, fig. 6 shows a schematic structure of a mobile terminal according to an embodiment of the present invention.
As shown in fig. 6, the mobile terminal includes a terminal housing 8 and the acoustic device, where the acoustic device is disposed on top of the mobile terminal to form a first sound generating device 1, and a first sound outlet portion communicating with the first sound hole and a second sound outlet portion communicating with the second sound hole are disposed on the terminal housing; the mobile terminal is provided with a receiver mode and an outward-playing mode, and when the mobile terminal is in the receiver mode, the linkage piece swings along a first preset direction; when the mobile terminal is in the play mode, the linkage piece swings along a second preset direction.
In addition, the bottom of the mobile terminal can be provided with a second sounding device 9, and the terminal shell is also provided with a bottom sounding part for transmitting sound waves of the second sounding device 9 to the outside.
According to the acoustic device and the acoustic device provided by the invention, the motor drives the folding cover plate to swing to one side of the first acoustic hole, so that the second acoustic hole and the first acoustic hole are isolated, the front acoustic cavity of the first acoustic device is communicated with the first acoustic hole, the rear acoustic cavity of the first acoustic device is communicated with the second acoustic hole, the sound leakage of the second acoustic hole is reduced, and the personal privacy is protected; and the motor also drives the folding cover plate to swing towards the side deviating from the first sound hole, so that the front sound cavity of the first sound generating device is communicated with the first sound hole and the second sound hole simultaneously, the rear sound cavity of the first sound generating device is closed, and then the stereo sound effect is realized through the cooperation of the first sound hole and the second sound hole, and the privacy requirement of a user and the high-quality tone quality experience requirement are improved; in addition, the passive vibrating diaphragm is further arranged, so that the waterproofing of the rear acoustic cavity can be realized, the dipole effect of the second acoustic hole and the first acoustic hole can be achieved, and the overall performance of the acoustic device is improved.
The acoustic device and the mobile terminal according to the present invention are described above by way of example with reference to the accompanying drawings. It will be appreciated by those skilled in the art that various modifications may be made to the acoustic device and mobile terminal as set forth in the foregoing invention without departing from the spirit of the invention. Accordingly, the scope of the invention should be determined from the following claims.
Claims (13)
1. An acoustic device comprising a housing and a first sound emitting device disposed within the housing, the housing having a first sound hole and a second sound hole disposed thereon; wherein,
A folding cover plate and a motor connected with the folding cover plate are arranged between the shell and the first sound generating device;
the first sound generating device comprises an active vibration system and a passive vibration system, the active vibration system comprises an active vibrating diaphragm and a voice coil for driving the active vibrating diaphragm to vibrate, the passive vibration system comprises a passive vibrating diaphragm, the active vibrating diaphragm and the passive vibrating diaphragm vibrate in the same direction, a front sound cavity is formed between the active vibrating diaphragm and the shell, a rear sound cavity is formed between the passive vibrating diaphragm and the shell, the first sound hole is communicated with the front sound cavity, and the second sound hole is switchably communicated with the front sound cavity or the rear sound cavity through the folding cover plate.
2. The acoustic device of claim 1, wherein the motor is configured to drive the folded cover plate to swing to the first acoustic port side so that the second acoustic port is in communication with the rear acoustic chamber and isolated from the first acoustic port, and the first acoustic port and the second acoustic port radiate sound waves of opposite phases;
The motor is also used for driving the folding cover plate to swing towards one side deviating from the first sound hole so as to isolate the second sound hole from the rear sound cavity, and the second sound hole is communicated with the front sound cavity.
3. The acoustic device of claim 1 wherein the acoustic device comprises a plurality of acoustic transducers,
The folding cover plate comprises at least two baffle plates connected through a hinge;
Two ends of the baffle are provided with extended limit sliding blocks;
The shell is internally provided with an arc-shaped sliding rail matched with the limiting sliding block, and the limiting sliding block is limited to slide in the arc-shaped sliding rail.
4. The acoustic device of claim 1 wherein the acoustic device comprises a plurality of acoustic transducers,
The first sound generating device further comprises a shell and a magnetic circuit system arranged in the shell, wherein the magnetic circuit system is arranged between the active vibrating diaphragm and the passive vibrating diaphragm, a magnetic gap for accommodating the voice coil is formed in the magnetic circuit system, and a through hole penetrating through the magnetic circuit system is formed in the magnetic circuit system.
5. The acoustic device of claim 4 wherein the acoustic device comprises a plurality of acoustic transducers,
The through hole penetrates through the center of the magnetic circuit system, a framework is arranged in the through hole, and the active vibrating diaphragm and the passive vibrating diaphragm are connected through the framework; or alternatively
The central area of the active vibrating diaphragm and/or the passive vibrating diaphragm extends into the through hole and is fixedly connected with the through hole.
6. The acoustic device of claim 4 wherein the acoustic device comprises a plurality of acoustic transducers,
The through hole is arranged at the position of the magnetic circuit corresponding to the magnetic gap, the voice coil penetrates through the magnetic circuit, and the active vibrating diaphragm and the passive vibrating diaphragm are fixedly connected through the voice coil, or
And a framework is arranged to penetrate through the through hole, one end of the framework is connected with the active vibrating diaphragm or the bottom of the voice coil, and the other end of the framework is connected with the passive vibrating diaphragm.
7. The acoustic device of claim 4, wherein the through hole is formed at a corner or a side of the magnetic circuit system, and a skeleton is disposed to pass through the through hole and has two ends respectively connected to the active diaphragm and the passive diaphragm.
8. The acoustic device of claim 4 wherein the acoustic device comprises a plurality of acoustic transducers,
A rotating shaft is arranged on the folding cover plate, a shaft groove corresponding to the rotating shaft is arranged on the shell or the shell, and the rotating shaft is limited in the shaft groove to move;
a strip-shaped limit bar is arranged at the free end of the folding cover plate or two extended limit blocks are respectively arranged at the two ends of the free end of the folding cover plate;
A first clamping groove and a second clamping groove which are used for limiting the limiting strips or the limiting blocks are formed in the shell; the folding cover plate swings in the first clamping groove and the second clamping groove.
9. The acoustic device of claim 1 wherein at least a portion of the housing is a terminal housing of a mobile terminal.
10. Acoustic device according to claim 1 or 9, characterized in that a screen assembly of a mobile terminal is also provided on the housing; and an acoustic outlet channel which is communicated with the first acoustic hole and the front acoustic cavity is formed between the screen assembly and the first acoustic device.
11. The acoustic device of claim 10 wherein the housing has a front side, a back side, a side connecting the front side and the back side, the front side is provided with the screen assembly, the first acoustic port is provided on the front side of the housing or at the junction of the front side and the side, and the second acoustic port is provided on the back side, the side, or at the junction of the back side and the side.
12. A mobile terminal, characterized by comprising a terminal housing and an acoustic device according to any one of claims 1 to 11, wherein the acoustic device is arranged on the top of the mobile terminal, and a first sound outlet part communicated with the first sound hole and a second sound outlet part communicated with the second sound hole are arranged on the terminal housing; wherein,
The mobile terminal is provided with a receiver mode and an outward-playing mode, and when the mobile terminal is in the receiver mode, the folding cover plate swings to one side of the first sound hole; when the mobile terminal is in the outward-playing mode, the folding cover plate swings to the side deviating from the first sound hole.
13. The mobile terminal of claim 12, wherein a second sound emitting device is disposed at the bottom of the mobile terminal, and a bottom sound emitting portion for transmitting sound waves of the second sound emitting device to the outside is further disposed on the terminal housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210311000.8A CN114938405B (en) | 2022-03-28 | 2022-03-28 | Acoustic device and mobile terminal |
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| KR200257575Y1 (en) * | 1998-12-18 | 2002-08-22 | 엘지정보통신주식회사 | Speaker sound induction device of terminal |
| CN105872919B (en) * | 2016-03-08 | 2017-04-05 | 上海安费诺永亿通讯电子有限公司 | A kind of speaker module |
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| CN113225643B (en) * | 2021-04-29 | 2022-11-22 | 歌尔光学科技有限公司 | Audio device and intelligent head-mounted equipment |
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